Young-Laplace overpressure ΔP = 2γ/R across a spherical meniscus

Layer 2 — Chemistryin the colloid-and-interface-chemistry subtree

Young-Laplace equation (Young 1805, Laplace 1806): the pressure jump across a curved liquid-gas interface equals surface tension γ times the sum of the principal curvatures. For a sphere of radius R: ΔP = 2γ/R. Drives capillary rise…

Related concepts

Gibbs free energy (G)
Young equation γ_lv cos θ = γ_sv − γ_sl (three-phase contact)
ΔP = 2γ/R at γ=R=1 ⇒ ΔP = 2 (unit-droplet canonical)

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